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The FMM mini air stone bubbler (8cm in diameter and 160 g in weight) is designed for FMM II users who want better water circulation coverage due to the shape and size of the pots being used. You can daisy-chain several FMM mini bubblers for greater coverage by simply connecting the mini air stone bubbler to the FMM II's secondary air outlet. Use of multiple air stones may require a stronger air pump.
This Air stone comes with silicone airline (1M) and is jacketed in a silicone rubber bumper.
For driving FMM II air circulator and the FMM air stone, a 4L+/min aquarium style air pump is recommended.